Name Digital Dual Temperature Controller Temperature measuring range -55C~120C Resolution 0.1 Controlling Accuracy 1C Relay contact current 10A/240V AC Temperature Sensor NTC10K Length of cable 1m Power supply DC 12V/110~220V/24V DC ( choose the one you need ) Data Save YES Working temperature 0C~50C Storage Temperature -10C~60C Default P0 : Delay start 0-60 minutes 0 P1 : Delay start 0-60 minutes 0 P2 High temperature alarm P3~120C 120C P3 Low temperature alarm P2~-55C -55C Long pre UP 1 button for 3 seconds, display flashes, pre UP or DOWN button to set the start temperature(25C default) Long pre DOWN 1 button for 3 second, the display flashes, pre UP or DOWN button to set the stop temperature (40C default) Long pre UP 2 button for 3 seconds, display flashes, pre UP or DOWN button to set the start temperature(25C default) Long pre DOWN 2 button for 3 second, the display flashes, pre UP or DOWN button to set the stop temperature (40C default) Long pre DOWN 1 and DOWN 2 button for 3 seconds to reset the controllers. Heating Mode--Start temperatureStop temperature There is no any output voltage of the controller , it is like a switch , you need to connect a power supply to the load, then it can work. 1 x Dual Digital Thermostat with Dual Sensors